The document discusses the percent proportion formula for calculating percentages. The formula is expressed as "Percent over 100 equals IS over OF". Two examples are provided to demonstrate how to use the formula to calculate percentages. The formula is emphasized as being important to remember for math in grades 8 through 11.

1. The Percent Proportion For use with grades 8 through 11

2. The Percent Proportion…how do I remember it? Percent over 100 equals IS over OF… It’s the percent proportion that I’ve grown to LOVE!

3. The percent proportion… % = IS OF

4. Example 1: 20% of what number is 30? % = is 100 of 20 = 30 100 x Cross multiply to find: 20x = 30(100) 20x = 3000 (divide both sides by 20) x = 150

5. Example 2: What percent of 200 is 12? % = is 100 of x = 12 100 200 200x = 12(100) 200x = 1200 x = 6, so our answer is 6%

6. Remember, the percent proportion is: Percent over 100 equals IS over OF… It’s the percent proportion that I’ve grown to LOVE! % = IS 100 OF